Choosing whether or not to trade loss of privacy for a discount is up to the individual (I wouldn't) but X-10 should be applauded for clearly disclosing what will happen if you click "Allow." Informed consent is a good thing. The FTC has been flooded with complaints from people who'd accepted a money-off coupon at checkout and whose credit cards were subsequently charged with bizarre difficult-to-unsubscribe, negative-option subscriptions buried in the coupon's fine print. X-10's disclosure is exemplary.